The GNU Scientific Library for Lisp (GSLL) allows you to use
the GNU Scientific Library
(GSL) from Common Lisp. This
library provides a full range of common mathematical operations useful
to scientific and engineering applications. The design of the GSLL
interface is such that access to most of the GSL library is possible
in a Lisp-natural way; the intent is that the user not be hampered by
the restrictions of the C language in which GSL has been written.
GSLL thus provides interactive use of GSL for getting quick answers,
even for someone not intending to program in Lisp.